5 Common Causes of Blocked Drains and How to Prevent Them

Posted by Melbourne Blocked Drains Plumbing on 17 Oct 2025

Blocked drains are an inconvenience that could cause disruption to your daily life. They can cause water damage, bad smells and even health hazards. If they’re not treated promptly blocked drains may cause serious issues in the plumbing system, which could lead to expensive fixes or replacings.

Key Takeaways

  • The blockage of drains can affect your routine and lead to the destruction of your home, bad smells, and even health issues.
  • Fat, oil and grease build-up can clog the walls of pipes causing blockages. Avoid pouring grease down the drain. Alternatively, use soap and hot water for cleaning dishes.
  • Tree roots naturally extend themselves into the earth to seek nutrients, which could cause serious damage to pipes and even completely block them which can cause flooding. Ensure you maintain the trees surrounding drainage systems by trimming them.
  • Wet toiletries, wipes, etc. can create unpleasant smells emanating around toilets/bin areas; only flush toilet paper down the drain.
  • Hair

In this article, we will review five common reasons for blocked drains and the best way to avoid them.

Cause 1: Grease, Oil and fat buildup

Fat, grease and oil might appear to be harmless substances to flush down the drain, but they can build up over the insides of the pipes, causing a blockage. As a result the water can’t move freely through the drainpipes. It is best to avoid the practice of pouring grease down the drain or use hot water and soap when cleaning dishes, as this helps break down grease-based substances.

Cause 2: Tree Roots

The tree’s roots gradually extend themselves into the ground looking for nutrients. This means that they grow toward underground pipes. Once they’re inside, the tree roots can cause massive damage and may completely stop them from flowing, causing flooding. Therefore, it is essential that if are near trees to regularly monitor their growth around drainage systems, by trimming them regularly.

Cause 3: Flushed items

It’s easy to assume that flushing biodegradable products such as wet wipes, sanitary towels etc. won’t cause any significant problems in the long term, However, if a large amount of these products are flushed down toilets they will resultantly pile up and push others away, in the way of pipes. This could cause unpleasant odors to emanate around the toilets and bins too! Make sure to remember what should be flushed and what shouldn’t (i. that only toilet paper needs to be flushed).

Cause 4: Hair

Additional Information

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Are you experiencing a clogged toilet, blocked shower drain, overflowing drains or an issue with your kitchen sink? We can help you sort out your drain blockage problem quickly and provide the following services:

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Clearing blocked drains can be difficult and it’s best to get a professional plumbing service involved to tackle it for you, To get your blocked drain in Melbourne cleared today, contact Melbourne Blocked Drains Plumbing now and speak to one of our friendly team members.

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